ScummVM and Broken Sword

Having sucessfully tried "Beneath a steel sky" I found my copy of "Broken Sword" which I haven't played in years. Following the instuctions on the website I added the addditonal files from the CDs into the same folders on my hard disk.

When I load ScummVM the game is recognised but it won't run I just get a black screen and then it just crashes generating a crash log:

From the website it appears that the developers have only tested the PC version as they don't have any others. Have any other Mac users tried it and had better luck? All the data files look to be the same as the PC version so I am kind of suprised it doesn't work.